GusGus11
05.10.2019 •
Mathematics
The first gardener can finish the job in 6 hours, and the second gardener can do the same job in 7 hours. how long it will take them to finish the same job, if they work together?
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Ответ:
3 3/13 hours
Step-by-step explanation:
you will first find out how many hours it will take for each gardener to do 1 part of the job. gardener 1 is 1/6 and the second is 1/7. you will next add the two fractions. this will equal 13/42. you will then multiply by the reciprocal to get 1, this stands for the whole job done together. The reciprocal is the answer, 42/13. You will then simplify that to 3 3/13 hours.
Ответ:
3x +4(2x) = 11x
In order for the equation to be true for all x, the value of b must be the coefficient of x on the left side.
b = 11.